I havent bought my base ring set yet . I am looking at EAW and Conetrol. Price is steering me to Conetrols. So how do I determine front or back adjustment first ? I could center the back and boresight the front and take it to the range to fine tune the front. What is the correct procedure to center the scope tube with the bore (not parralel on one side but on center of top of bore )? I read the article on leveling the reticle but I know one of You guys Know the proper procedure. Thank You !